Adjustable tensioning weight for the lace thread in the lace bone or bobbin



22, 1932. J RElcH E AL 1,850,475

ADJUSTABLE TENSIONING WEIGHT FOR THE LACE THREAD IN THE LACE BONE 0RBOBBIN Original Filed June 12, 1930 llllmn Q &

is used, in which the inner Patented Mar. 22, 1932 UNITED STATES PATENTOFFICE JENtj REICH AND LIPGT MAYEBHOFER, BUDAPEST, HUNGARY ADJUSTABLETENSIONING WEIGHT FOR THE LACE THREAD IN THE LACE BONE OR BOBIBINOriginal application filed and this application filed March 28, 1931.

The invention relates to adjustable tensioning weight for the lacethread in the lace bone or bobbin and is a division of our copendingapplication No. 460,743.

Tensioning' weights are already known, wherein a thread guiding rolleris provided for the purpose of reducing the friction on the thread, andalso such having a release eyelet, but in their case the thread guideroller and the release eyelet are free so that as the thread is beingdrawn off it rubs against the bobbin, thus producing a sharp edgethereon which in time severs the thread. This disadvantage is eliminatedin the case of the tensioning weight according to the present inventionas in this case the thread guiding roll and the releasing bolt arearranged within a U shaped housing, the upper arcuate edge of whichraises the bobbin in such a manner that no sharp edge can possibly formthereon. A further advantage of the invention is to be found therein,that the tension of the spring can be regulated by means of a pin pushedthrough a hole drilled crosswise through the shaft, so that it is notnecessary to change the weights according to the quality of the threads,but only the tension of the spring.

An embodiment of the invention is shown as an example on theaccompanying drawings, in which Figure 1 shows the adjustable tensioningweight of the bobbin of the rope or string braiding machine as a frontview and Fig. 2 is a side view of the tensioning weight without aspring, whereas Fig. 3 1s a top view of the adjustable tensioningweight.

The adjustable tensioning weight of the bobbin or the braiding machineconsists of a head a of a square cross section provided at its lowerface with a downward cylindrical shank or shaft. This shank is reducedat two places 6, 6 each reduced part having a transverse hole cl, aspiral spring f being coiled around the part 17 The top extremity of thespring is fixed by means of a pin pushed through the top hole d to theshaft 1) or 79 whilst the lower extremity of the spring is formed intoan eyelet or looph. According to whether a stronger or weaker springdiameter of the June 12, 1930, Serial No. 460,743, and in HungaryFebruary 18, 1930. Divided Serial No. 526,028.

pitch of the spring is greater or smaller, the top end of the spring isfixed by means of the pin gto the thickest part b or to the thinnestpart A second pin 9 which is inserted into one of the holes below thetop hole serves the purpose of regulating the tension of the spring. Acavity is provided in the head a of square cross section, whilst twoopposite sides and the toppart thereof is open. In the interior of thehead there is a. roller 71 which is rotatably fixed on a riveted in boltA second bolt is is riveted in above the pin j, an opening being leftbetween this bolt and the edge of the roller 2' which makes it possibleto insert a lifting hook under the bolt is and thus to lift the weight.The top side of the head a is arcuated in shape.

The yarn or thread coming from the wooden yarn bobbin (toothed bobbin)is threaded in the usual manner in the bobbin of the yarn braidingmachine, and is passed through the cavity in the head a of theadjustable tensioning weight arranged in the bobbin of the braidingmachine in such a manner, that the threads lie in the groove of theroller 2' whilst the free end of the threads is gripped by the stripperof the braiding machine. When heavy tensioning weights are used, a clampis provided at the top of the bobbin which prevents the bobbin risingwhen the thread runs oif from the bottom. As is well known the threadsare kept tensioned by the weight. The grinding, sliding friction of thethread is eliminated by the roller i, as the thread rotates the rolleraround the pin j, thereby preventing any sliding or slipping of thethread, and this circumstance makes it possible to considerably increasethe revolution of the machine without any danger of tearing the thread.The design of the adjustable tensioning weight according to theinvention presents besides the above mentioned also still furtheradvantages. It was a known deleterious cause inherent to the hithertoknown and used tensioning weight that the dust and dirt penetrated whenthe spring was being tensioned between the separating turns of thespring, into the interior thereof, and settle there and influence theaction of the spring deleteriously. The entry of this dirt is preroundedofl? in an vented by the shaft 6, which at the same time also acts as aguide for the spring. The holes provided in the shaft 1) and the pin gpushed through them makes it unnecessary to have to exchange the weightsto suit the quality of the threads. be altered by inserting the pin 9into one or the other of the holes d, thus obviating the necessity ofexchanging the weights of the spring; If it is notwithstanding requiredto exchange the springs, then this can be efl'ected Without altering theweights, as the stouter spring can be fixed to the stouter portion ofthe shank b to the thinner portion of said shank b. Finally the pin 7:serves also for the purpose of enabling the adjustable tensioning weightto be easily lifted out of the interior of the bobbin of the braidingmachine by means of this pin or trunnion. To achieve this purpose thehead a is rounded off at the top, so that it can freely accommodate thebobbin above it.

We claim Adjustable thread tensioning device with a thread guidingroller for bobbins of braiding and lacing machines characterized by thefact that the tensioning weight is provided with a forked U shaped head(a) open at the top, in which both the rotatably fixed thread guidingroll (2') as Well as the lifting bolt (/0) is mounted, the top edges ofsaid head being arcuate manner, and that it isprovided with a shaft (6)provided with severalcrosswise holes (01), the spiral spring (f) beingguided on said shaft and being fastened to a pin (g) inserted in the tophole, the tension of said spring being adjustable by means of a secondpin (9 by inserting it into oneor the other of said holes, according torequirements.

JENO REICH.

LIPOT MAYERHOFER.

The tension of the spring can and the weaker spring

